Question

我在这里难以理解这个问题。从我的角度看，当任何这些条件成立时，循环应该继续执行。当所有的＆＃34;如果＆＃34;条件是真的，应该启动并终止程序。我做错了什么？

double height ;
double width ;
double load ;
double buckle_threshold ;
double area ;
double compress_threshold ;
double slenderness_value ;
const int slenderness_limit = 50 ;
const int E = 1700000 ;
const int stress = 1450 ;
const int inches = 12 ;

cout << "Enter column height in feet: " ;
cin >> height ;
cout << "Enter expected load in pounds: " ;
cin >> load ;

while ( load > buckle_threshold || load > compress_threshold || slenderness_value > slenderness_limit );
{
    cout << "Enter column width in inches: " ;
    cin >> width ;

    slenderness_value = (height/width)*(inches) ;
    area = width*width ;
    buckle_threshold = (.3*E*area)/(pow((height/width),2)) ;
    compress_threshold = area*stress ;


    if (load <= buckle_threshold && load <= compress_threshold && slenderness_value <= slenderness_limit );
    {
        cout << "Compress Threshold = " << compress_threshold << endl ;
        cout << "Buckle Threshold = " << buckle_threshold << endl ;
        cout << "Column is safe." ;

        return 0;
    }

    cout << "Compress Threshold = " << compress_threshold << endl ;
    cout << "Buckle Threshold = " <<buckle_threshold << endl ;
    cout << "Column is unsafe." << endl ;

}

return 0;

Answer 1

while / if循环上有分号。删除它：

while ( load > buckle_threshold || load > compress_threshold 
 || slenderness_value > slenderness_limit );  <--- Right there!


if (load <= buckle_threshold && load <= compress_threshold 
&& slenderness_value <= slenderness_limit );  <--- Here too!

这个while循环需要一些建议

1 个答案: